Put the protein bread mix into a bowl and add water to make the dough.
Place the dough onto the pan with an ice cream scoop and cover with a fish-shaped bread mold.
Add filling (whole protein yogurt or tofu, low-sugar sweet red bean, etc.) into the fish-shaped mold.
Cook both sides of the fish-shaped bread until golden brown.
Cool the finished fish-shaped bread and serve on a plate.